There is a quiet revolution going on. If you thought Wikipedia was awesome then take a look at Wikibooks - open-source digital textbooks on any topic, in any language, available to anyone, anywhere, for free!
In the longer term, along with open access journals, this is really going to shake up the academic publishing world. Read the article to start to understand the true impact of this idea.
And take a look at the Wikiversity Project - read the vision statement - the potential is enormous.
